search for: iodrive

Hi all, I have evaluated Fusion-io ioDrive duo (PCIe direct attached NAND flash memory storage) on the CentOS 5.4. The experimental result shows the write performance with multiple jobs (processes) on the ext3/ext4 filesystems is lower than that of XFS. The question I have is what is the cause of the ext3/ext4 performance limitation. I hav...

Hey folks, This might be a daft idea, but is there any way to shut down solaris / zfs without flushing the slog device? The reason I ask is that we''re planning to use mirrored nvram slogs, and in the long term hope to use a pair of 80GB ioDrives. I''d like to have a large amount of that reserved for write cache (potentially 20-30GB), to facilitate rapid suspend to disk of multiple virtual machines. I suspect there will be a few problems with this configuration though. My first concern is does ZFS have any limits on the maximum...

...I ran into.. Also, tcm_vhost driver has been merged into a single source + header file that is now living under /drivers/vhost/, along with latest tcm_vhost changes from Zhi's tcm_vhost tree. Here are a couple of screenshots of the code in action using raw IBLOCK backends provided by FusionIO ioDrive Duo: http://linux-iscsi.org/images/Virtio-scsi-tcm-vhost-3.5-rc2-3.png http://linux-iscsi.org/images/Virtio-scsi-tcm-vhost-3.5-rc2-4.png So the next steps on my end will be converting tcm_vhost to submit backend I/O from cmwq context, along with fio benchmark numbers between tcm_vhost/virti...

...I ran into.. Also, tcm_vhost driver has been merged into a single source + header file that is now living under /drivers/vhost/, along with latest tcm_vhost changes from Zhi's tcm_vhost tree. Here are a couple of screenshots of the code in action using raw IBLOCK backends provided by FusionIO ioDrive Duo: http://linux-iscsi.org/images/Virtio-scsi-tcm-vhost-3.5-rc2-3.png http://linux-iscsi.org/images/Virtio-scsi-tcm-vhost-3.5-rc2-4.png So the next steps on my end will be converting tcm_vhost to submit backend I/O from cmwq context, along with fio benchmark numbers between tcm_vhost/virti...